Mars once had sprawling river systems that rivaled major watersheds on Earth, and scientists have now identified the biggest ...

This past week, nonagenarian Don Kelsey — a retired educator and handyman — visited Lowell Observatory with family and ...

Humanity’s next great expansion is no longer a thought experiment. It is unfolding in real time in orbit, around the Moon and ...

One may easily regard oneself as no more than a speck compared to the universe. Thirteen and eight-tenths billion years after ...

NASA shares Mars images processed through an Earth-like color filter for a more familiar view. JFK's niece has message for ...

NASA’s Europa Clipper spacecraft has recorded important new observations of the interstellar comet 3I/ATLAS using its ...

NASA’s Curiosity rover will go dark for a few weeks due to a conjunction between Earth and Mars, blocking communication ...

Scientists have identified eight mysterious water-shaped caves on Mars, unlike volcanic tunnels, raising fresh hopes these ...

ESA images show a large meteoroid strike on Apollinaris Mons, leaving more than 100 mysterious moving dust marks on Mars.

Futurist Michio Kaku sees humans doing ballet on Mars and projecting their brains into the cosmos. And aliens? Oh, they're ...

Editorial: Over the holiday period, the Guardian leader column is looking ahead at the themes of 2026. Today we look skyward, where a new lunar contest mirrors humanity’s struggle to live within plane ...

Long before Mars became the cold, dry world we see today, rain once fell across its surface. Water gathered in low-lying valleys and river channels ...